Welcome to the Dave Jones Machinists, Manufacturers of SIGHT-PIPE® style borescopes and SIGHT-PIPE® SYSTEMS’ Home Page. Dave Jones Machinists was founded in 1969 and introduced the SIGHT-PIPE® style borescope product line in 1970. SIGHT-PIPES® , are essentially one piece borescopes fabricated from optical grade materials. They provide a practical, economical solution to viewing and/or gaging “difficult to inspect” internal characteristics. Insert the SIGHT-PIPE® into a machined bore or cavity, and look into the top of the head. You will see a well lit image of the interior of the bore, which you can inspect for weld condition, burrs, porosity and any other visual characteristic or defect